vibram five finger men's kso are made with a thin, abrasion-resistant stretch polyamide mesh fabric fits up over your arch on the foot - for comfort and quick drying. A flexible, non-marking TC1 performance rubber sole is razor-siped to enhance grip over a variety of terrain. KSO IS BEST FOR: Light Trekking, Climbing, Canyoneering, Running, Fitness Training, Martial Arts, Yoga, Pilates, Sailing, Boating, Kayaking, Canoeing, Surfing, Flats Fishing, Travel